This isn’t to scare you off. I simply want you to know that this guide is going to focus solely on ways to make real, sustainable extra income online. Not just a few bucks. I want to share all the mistakes I've made that got me to where I am now so that you don’t have to go through them, and can build a successful online source of income for yourself.
Copywriting. Bloggers and business owners are out there looking for freelance writers to help them with their internet marketing campaigns. If you can write a good video marketing script, sales copy, press release, product reviews, website content and advertising copy, you can make money doing exactly that. You may need basic SEO skills since most of these copywriting jobs require some knowledge on how search engines work. These people are looking for traffic, and they will only hire you if you can deliver that.[1]
Love dogs, but not ready to get one of your own? Get your fix by taking care of other people’s pooches — and get paid for it. If your home isn’t dog-friendly, consider becoming a dog walker. Apps like Wag! offer on-demand dog walking, so you can pick up walks when your schedule allows. If you have space (and your landlord’s permission, if you rent), offer overnight dog boarding. Dog sitters on Rover.com, the go-to site for pet-sitting, generally command $25 to $35 a night, according to the company.

Sell your business. Determine how much your business is worth. Look for a buyer or group of buyers. Talk to people you know and ask them if they are interested or might know people who are. Senior employees may be interested in buying the business. Negotiate a fair price and create an exit strategy for your departure. Selling a successful business is one of the best ways to make a lot of money as a teen.

Parlay your math, science, foreign-language or test-prep expertise into a lucrative side gig by becoming a private tutor. You can tutor people online or in-person. What you charge can depend on your experience, expertise and what’s in demand. To get started, see what types of tutors are needed on Craigslist, or create a profile on sites like Tutor.com or Care.com. You can also advertise your services at local schools and community centers.
Salvage and resell. Do you love antiques or have a knack for finding valuables at flea markets or yard sales? If you do, it might be time to consider salvaging items for resale – or even scouting out antiques to sell for a profit. While you’ll need to spend quite a bit of time searching for prospects and spend some money buying upfront, you could easily turn a profit if you know what you’re doing.
Become an Amazon Associate and then use Keyword planner to find an in-demand niche: With more than a million different products to choose from and up to 10% commission the sales you drive, Amazon’s affiliate program is a great place to get started. Browse their available products and see what connects with you. Or take it a step further and use Google’s Keyword Planner to quickly check how many people are searching for a specific term. With affiliate marketing, the more relevant traffic you can pull in, the more you’ll make off your site.
Choose your niche and check for demand: The golden course combination is when you can find an in-demand niche that aligns with your skills and unique experiences. A great way to do this is to use Google Trends and Google’s Keyword Planner to look for average monthly search volume for keywords related to your proposed course content. Are people actively looking for high-quality information about this subject? Of course, if you’re already creating content for a blog, coaching service, or a site like Medium, you can test demand this way for free just like Bryan did.

Love dogs, but not ready to get one of your own? Get your fix by taking care of other people’s pooches — and get paid for it. If your home isn’t dog-friendly, consider becoming a dog walker. Apps like Wag! offer on-demand dog walking, so you can pick up walks when your schedule allows. If you have space (and your landlord’s permission, if you rent), offer overnight dog boarding. Dog sitters on Rover.com, the go-to site for pet-sitting, generally command $25 to $35 a night, according to the company.

Write a business plan. Include information on what you plan to do and what differentiates you from competitors. Incorporate market research that shows your understanding of the business sector you wish to enter. Detail what you will sell and how. Consider including a marketing plan and realistic financial projections, if you are 13-15, get some help from an adult if you need to.[3] This will give you structure as you go about starting your business.

Now you’ve got many different options to start earning online. If you saw something that really interests you, try it out and learn more about it. If you’re really wanting to make a full-time income online, you need to be dedicated to learning how to do what you want to do. There are tons of free resources out there. You just have to search for them!

Build a prototype or working model. Determine whether you will offer customers a product or a service. Focus on a quality or feature that makes your product or service stand apart from competitors. Put together a prototype of your product or a working model of your business that focuses on this quality. If you intend to open a sweet shop, your working model might be tricky. Test your business with a small number of people to determine customer reaction. Modify your prototype or model based on positive and negative reactions.[5]

Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online.
Robo-advisors are diversified investment accounts that are automatically managed by a computer algorithm (as opposed to a human money manager). If you want to invest, but don’t have the money, or don’t want to invest with a money manager, robo-advisors are for you! Robo-advisors make investing easier—and cheaper—so they’re perfect for new investors.